SU1341192A1 - Method of automatic control for process of purifying diffusion juice - Google Patents

Abstract

The invention relates to the sugar industry of the food industry, namely to the automatic control of the cleaning of diffusion juice. The purpose of the invention is to increase productivity and improve the quality of the juice. The method involves maintaining the ratio between the actual filtration rate and the desired one by affecting the pH of the juice of the first saturation, the ratio of the diffusion juice and the juice of the first saturation returned to the pre-defector, and the ratio of the diffusion juice and lime slurry. the first carbonation is determined taking into account the consumption of diffusion juice for cleaning. This method provides for a certain sequence of calculation of tasks, due to the degree of influence of the parameters K, pH and Kj, where K is the ratio of the costs of diffusion juice and juice of the first saturation; pH - set the pH value of the juice of the first saturation; K 2 is the ratio of the costs of diffusion juice and lime milk to the cleaning effect; filtration rate of the juice of the first carbonation and lime consumption for sugar production. 1 hp f-ly, 1 ill. sl with so

Description

The invention relates to the sugar industry of the food industry, in particular to the automatic, management of the process of purifying diffusion juice, including preliming, main defecation and first saturation.

The aim of the invention is to increase productivity and improve the quality of diffusion juice.

The drawing shows a block diagram of a system for controlling the process of cleaning a diffusion juice that implements this method.

The costs of diffusion juice, lime slurry and juice. The first saturation returned to the preliming is measured by sensors 1,2 and 3, respectively. The pH of the juice of the first carbonation and the filtration rate of the juice of the first carbonation are measured by sensors 4 and 5, respectively. The outputs of sensors 1–5 enter the information collection and processing unit 6. The output of block 6 is connected to block 7, the signal from which goes to block 8.

The outputs of the block 8 through the electropneumatic transducers 9, 10 and 11 are fed to the actuators 12, 13 and 14.

A method for automatically controlling the process of cleaning a diffusion juice is carried out as follows. Signals proportional to the consumption of diffusion juice, lime suspension, juice of the first saturation on the dreadlobulin are measured by sensors 1, 2 and 3, respectively, and signals proportional to the pH and filtration rates of the juice of the first carbonation are measured block 6. The latter also receives information on the number of operating juice filters of the first saturation. Block 6 checks for the need to change the processing mode of the diffusion juice. A change in mode is necessary when the flow rate of the diffusion juice or the number of operating filters is changed. In these cases, a given filtration rate V is calculated. The mode change is also necessary in case of a change in the actual filtration rate V, which may change if the quality of the processed beets has changed. Then, depending on the change in the filtration rate from the given value, a new

value of setting the pH controller, + jpH at V t VT-P.

1C

.BEHIND

The calculated pH value. Post. goes to block 8 as a task for the controller,. The output of the regulator through the converter 11 is fed to the actuator 12, which regulates the supply of saturation gas to the first saturation apparatus. Thus, the setpoint pH is stabilized. Search mode is carried out in cycles. An increase in the pH of the juice of the first saturation leads to a decrease in the filtration rate and an increase in the cleaning effect.

Thus, the actual filtration rate of the juice of the first carbonation approaches the target one, and the cleaning effect increases.

If the calculated pH value is beyond the limits, then the new value of the ratio ratio of diffusion juice and return juice of the first saturation to the predeterminer, KK - YU is calculated. The output of the ratio controller through the converter 10 and the actuator 13 supports the specified ratio , thereby regulating the filing of the return of the juice of the first carbonation in

35 depending on the flow rate of diffusion juice and the number of operating filters.

Reducing the ratio of diffusional juice consumption and

40 juice of the first saturation returned

on predefinition, leads to a decrease. filtration rate and increasing cleaning effect.

If the calculated ratio of the 45 ratio is out of limitation, then a new value of the ratio of diffusion juice and lime milk consumption K / Kj + -dKj is calculated. .

50 The stabilization of the new value of K is carried out by regulating the supply of lime milk with the help of the p-converter 9 and the actuator 14.

55 If the calculated ratio

out-of-limit, then the message Exhaust control is displayed

In the case of V i V, the algorithm of functioning of the system is similar.

313

described above, only the sequence of calculating the new values of the tasks occurs in the following order K

BEHIND

pn

1 s

then kj

Definite after - -

The consistency of calculating tasks is determined by the degree of influence of these parameters on the cleaning effect, the filtration rate of the juice of the first carbonation and the consumption of lime on the production of sugar.

Claims (2)

Maintaining the correspondence between the actual filtration rate of the juice of the first carbonation and the given one increases the amount of removed unsafe from the juice of the first carbonation and leads to an increase in the cleaning effect by 4-5% compared with the known control method, which reduces the loss of sugar in molasses, thereby increasing performance and improves the quality of diffusion juice. Invention Formula one . The method of agromatic control of the diffusion purification process Ibestkodo ed iy f one ii  Cs 1115 ll 5g  l | ll "j Editor I.Rybchenko Compiled by G. Bogachev Tehred L. Serdyukova Proofreader S. Shekmar Order 4400/30 Circulation 330 VNSHPI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 -Production and printing company, Uzhgorod, st. Project, 4 13A vest BUT eu shit and a- IQ increased 5 tki 20 chi 1924 juice, which regulates the supply of milk of lime depending on the ratio of the costs of diffusion juice and milk of lime and regulates the supply of saturation gas depending on the change in the filtration rate from a given value, which is characterized in that in order to increase the performance and improve the quality of diffusion juice , measure the pH value and regulate the flow of the return of the juice of the first carbonation depending on the ratio of the costs of returning the juice of the first carbonation and diffusion juice, while p The adjustment of the saturation gas supply is carried out taking into account the pH value. 2. A method according to claim 1, characterized in that the predetermined filtration rate is determined depending on the flow rate of the diffusion juice and the number of operating filters. N. Subscription